Human brains are really good at using a new-found advantage to exploit stuff. The environment, animals, other humans. Sometimes this is great, like being able to exploit physics to provide clean nuclear energy to the masses, but usually these new advantages go dark before they go light. Um… nuclear bombs?
Every advantage I can think of was bad before it was good… except for gunpowder, ironically. Initially that was just for fireworks, until Europeans realized the missed opportunity to weaponize it.